Hydraulic molding-press.



P. BONVILLAIN.

HYDRAULIC MOLDING PRESS. APPLICATION FILED JUNI: I. 1904.

ummm STATES PATENT 'opi-iron PHILIBERT- BONVILLAIN, op PARis, FRANCE.

HYDRAU LIC MOLDI NGI-PRESS.

To a/ZZ whom, z2/t magical/baarn:

Be it known that 1,. BnnrnnnrBoNvrLnArN,

l a citizen of the Republic of France, and a resi,-

dent of Paris, France, have invented certain neW and useful Improvements in or Relating.

to Hydraulic Molding-.Press following is a speciiication.

es,` of `which the This invention relates toa hydijaulic moldi ing-press for foundries designed both so as tov facilitate Working and to reduce to a'strict minimum the expenditure of Water` under pressure- A press according to this invention is illustrated, by Wayot example, in the accompanyin drawings, in Whichiguie l is a sectional elevation. Fig. lay

isa horizontal section on a plane in the direction of line a; of Fig. 1,;--Fig- 2, a side elevation, and Fig- 3 a plans Fige is a verticaly section along the line f1 4 of Fig- 5, showing al simpl-titled construction oi the press! Fig' 5 is e'horinontalsection along'the line .545 of" Fig. el. l e K The lrnaohine shown in Figs, 1 to 3 coniprises` a hollenr trarne 6. of round or rectangular shape, the upper portion of which foi-'Ins a ring or other support or table 7 recessed at its inner edge for the purpose of forming a shoulder 8 intended to receive the ends of the loars 9 9, The table 7. is provided with a lateral lug l0, in which is rnounted a vertical colurnn 11,.on the top of Which pivoted al swinging cross-beam l2- To the free, end oi this cross-hearn is pivoted a depending hook 13,- the lovver end oi which can engage under the outer edge of the teh-le 7, as shown in the drawings On a honi-rental partition v14 in the trarne 6 is vertically inounted a cylinder l5., in Which vvorlrs a piston 1d This piston supports a mold-removing plate 17, the ends of which,

Yprojecting beyond v'the irarne, are guided in arge openings I8 in thelatter. vThe upper` portion of the piston ld is screw-threaded for the purpose oi receiving a nut 19, also screwthreadedoutside to receive a tapped collar or ring 201 This collar can he stopped loy means of a set-screw 1 The Bange ofthe eylind'er'liis provided with a groove 22, adapted to Vreceive the inner lovver projection 23 of a half-ring 24, Figsl and '3provid1ed at the to. with another inward projection A25., inten ed to. forni l a stop for the collar 20, as,` hereinafter e1;-

plainfed The half-collar .2,4 is pivoted. to a Pin-2d,L secured to ',theparti-tion le, and is, on

Speccatio'n of LettersV Patent.

Application led June 1, 1904. Serial No. 210,746.

`37, passing through the conrrn Patented MaI-cli 20,1906,

Lshovvn in Fig. '3Q The plate 1,7 is also pre1 und wat core-'pushes ee or ventunenne `platelifters, accopdingte eircuidlstances,v

The cross-benin 12 is cast or provide'd'with tWo superposed cylinders 83 and Se oi difierent diameters-011 the saine verticalaxis, the smaller cylinder being aleove the larger "one- These cylinders receive, respectivelypistons 35 and. 3,6, mounted on the piston-rod perating plate 1,7 are niou'ntthe other*` hand, connected by a pod 28 tov an plate or partitionof the two cylinders. A The vpiston 3d is provided at the side e vertical. groove 38,'in Which engages the end ofa screvv 39, seoured to the lower edge of the cylinder Safor preventing the piston 36 troni turning, ,The piston is internally screwthreaded to receive a screivethreaded socket 40, having a hand-Wheel 1,1 on its loner end, and the seclret is alsotapped to receive inter.F

4nally another socket terminating et' the.Y hottoIn in aflange or disk 43, to Which-is secure/d the press-plate 14, The 'disk d3 is provided vvith el vertical rod Ll5,freelysliding in n lug 4.6 on. the cross-.har ,12,ior the purpose oi preventing the socle-et 42, ironiturningv The pattern-plate, L17 t8. is lined to the ta- `lole 7 over the. cross-hars 9- The here t9, con.-

taining the sandreq11 ,iref.c.l ior rnolding, is

placed in the usual niannerv on the pattern- `plate 47 48.A 'This'box op flask is provided with laterallugs 50,v the under sides-.oi which are adapted to contact vvi-th theliftingl-rods ln order to effect a melding-operation, the hon 519 is. filled with sand and is placed the IYOG pattern-plate 47 478! The-rod-holdersf 29 are then so arranged that the rodsv` 31 are irrime- `diate'lyY loelovv the lugs 50 oi the hun andata certain distance thereironi, as will he further described lof-ilovvl The cross-.beam 12 is brought into its no rrnal position by engaging the hoolr 13 under the outer-edge oi' the table' 7. The pushers 32 are also putinto place op- Posite the cores of the panelen-plage 47 4g, Y(See FigE 1,) Y e Water 11D9-lei" pressure is being consi-,aptly IIO admitted under the piston 35, which thus always has a tendency to raise the piston 36 and plate 44 upward. After this rising the available height above the mold ready for compression is regulated by turning the handwheel 41. The socket 40 rotates with the handwheel, and since neither the piston 36 nor the socket 42 can turn the whole piston device will elongate or shorten, according as the hand-wheel is turned in one directionor the other. The pressure-plate 44 is thus brought by hand within a suitable distance of the flask 49, thus avoiding unnecessary expenditure of water under pressure and waste of time, which would be unavoidable without this arrangement. The height of the plate 44 is adjusted once and for all for a given height of pattern-plate and iiask.

By means oi suitable valve-gear Water under pressure is admitted on the top oi the large piston 36, (in the modification shown in Fig. 1,) which descends with the pressureplate 44 onto the sand contained in the box vand compresses it in the usual manner. Water is then admitted under the piston 16, which raises the plate 17 the rods 31, and the pushers 32, which compress the cores and any other portion of the sand which is to be submitted to extra pressure from the under side. These pushers must at irstonly rise `to the height required for effecting the above compression in a proper manner. Immediately that result is attained the upper end of the rods 31 must be so arranged as to come 35.' f For this purpose the rods are provided at their ends with adjustable heads 31 31,

all possible precision.

into contact with the lugs 50 on the box 49.

which enable their length to be adjusted with Moreover, before the above-mentioned operation takes place the half-collar 24 is brought into engagement ywith the groove 22 ofthe cylinder 15, the position of the collar 20 having been regulated by turning it in one direction or the other, so

that when the compression of the cores has been completed the collar 20 will engage against the upper projection 25 of the halicollar 24 and stop the ascent of the piston 16.

In the case Where a large number of identical patterns are on the same plate, and consequently alarge number of cores of the same height, the collar 20 is specially useful. Instead of adjusting the pushers singly for each core they are all made of the same length, secured on the table 17, and at a single operation by adjusting the collar 20 the extent of compression is fixed for all the cores. The position oi the collar 20 regulates, therefore, the upward stroke of the'plston 16 to the required height for com ressing the cores, and the'machine is ready or removing the mold. In order to effect this removal, Water is allowed to escape from the top cylinder 36, the piston of which rises under the action of the small piston35, still containing water under pressure. By means ofthe lever 27 the halicollar 24 is disengaged from the ring 20 and groove 22. There being now nothing to prevent the ascent of the piston 16, it rises under the action of the water, together with all the parts carried by it. The pushers 32 support the cores or other sand parts that they had previously compressed, and the rods 31 at the same time raise the iiask 49 by means of its lugs -50 until it is suiiiciently disengaged irom the patterns 47 48 to enable it to be removed laterally. In the event of' stripping-plates being used for preventing any of the molded sand from belng broken away these plates would also be raised by rods suitably arranged on the plate 17. The bars 9 being capable of being placed in any desired position, it is easy to arrange them suitably for allowing free passage to the pushers. The half-mold or flask 49 having been removed, the water from the cylinder 15 is allowed to escape, the nut 19 stopping the piston 16 and the plate 17 in their downward stroke on striking the upper edge of the cylinder 15. By adjusting the nut on the screw-threaded portion of the piston 16 the lower position of the plate 17 can be regulated so as to limit the length of the stroke for removing the mold for a given patternplate to the amount strictly necessary.

The machine shown in Figs. 4 and 5 is intended Jfor a smaller output 0r is of' smaller size than the preceding one. The cylinder 15 of the piston 16 is cast in one piece with the frame 6. The upper flange of the piston 16, supporting the plate 17, is provided at the side, a vertical screw 51 passing through an aperture 52 in the frame 6. This screw has a nut 53 for limiting the length of travel of the mold-removing stroke for each patternplate by striking with its bottom portion a ateral projection 56 on the cylinder 15. This nut 53 has an outside screw-thread to receive a nut 54. This nut, together With the halfcollar 55, pivoted under the frame 6, insures a fine adjustment of the amount of compression of the cores or other parts which have to` be subjected to double pressure. rangement is similar to that previously described; but the parts are arranged at the side of the piston instead of being mounted directly upon it.

It Will be understood that in either construction it is possible by using strippingplates to obtain independently of the top compression of the sand by the piston 36 an under compression by the piston 16, and consequently a more homogeneous compression of the sand contained in the flask.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I'declare that what I claim is- 1. In a hydraulic molding-press, the combination with a frame forming a table at its IOO This arupper part7 of an upper turning cross-headv mounted upon a column carried by the frame, a cylinder secured to' said cross-head, a piston in the said cylinder, screw-sockets on the interior of the piston, a pressurelate xed upon the inner socket, a rod iixe upon one of said sockets and guidedin a cavity'of the cross-head, a cylinder formed with the firstlnamed cylinder and located above and in line with it, a piston in the said second cylinv der, a rod connecting this piston to the iston of the main cylinder, a hook jointe to the extremity of `the turning cross-head, a lower plate carrying the means for removing the mold, and means for causing the said f late to ascend and descend7 substantially as described and for the purpose specified.

2. In a hydraulic molding-press, the combination with the Jr'rame forming a table at its upper part, of an upper turning crosshead mounted upon a column carriedby the frame, a cylinder connected with the said cross-head, a piston in the said cylinder, screw-sockets on the interior of the piston, a pressure-plate iixed upon the innersocket, a rod ixed upon one of said sockets and guided in a cavity oi"l the cross head, a cylinder formed with the first-named cylinder and located above and in line with it, a piston in 3o the said second cylinder, a rod uniting` this piston to the lpiston oi the main cylinder, a hook jointed kto the extremity of the turning cross-head, a lower plate carrying the means for removing the mold, a piston carrying the said lower plate, a cylinder for accommodating said piston, a 'screw-nut upon this piston,

an adjustable collar screwed upon the said nut, a divided collar jointed upon the frame anld having the up er and lower parts embracing the said co lar, and an operating-lever connected with saidcollar, substantially as described and for the purpose specified.

3. In a molding-machine, the combination with a frame forming a table at its upper part, of a cylinder lixed upon this frame, a piston located in the said cylinder, a plate xed on the upper part of said piston, rods placed upon the said plate, bolts upon the said plate,` supports secured by these bolts,

and rods seated/in these supports and having adjustable heads, substantially as above described and for the purpose speciiied.

In testimony whereof I have signed ymy name tothis specification in the presence of two subscribing witnesses.

PHILIBERT BONVILLAIN. I 

